SP> The only lens that I know of and that gives 99% natural out of focus areas SP> is Minolta 135 STF with apodization filter and two diaphragms - here is SP> review of this extraordinary lens with some samples: SP> http://www.magnuswedberg.com/docs/STF-review/
Now that's very interesting! I wouldn't say it gives a natural Boke, IMHO there is no thing as natural Boke, or is there? Is one curve of transition from light to dark better than other? Is a diagonal curve better than exponential? Or natural boke could also be one that doesn't curve at all, which is just a flat same-shade disk... So what's natural? But I digress :) The idea of putting a graduated filter in the nodal point of the lens to achieve the gradation of the OOF areas is neat. Although I am thinking if the similar hadn't been done before with gradual Waterhouse stops. Ok now, I could imagine a DIY project... Botching a long-focus 80mm symmetrical lens and adding such a graduated stop!!! Frantisek
